ive never made this, so im browsing for recipes. basically its an acidic marinade skewered steak thing. so the main things i see are meat + vinegar + overnight soak. i guess every country does it a bit diff.

any recipes? any cooking tips? it will be on a charcoal or gas grill.
and what kind of meat am i looking for at the store?

You can use pork, lamb, or beef. The pork shoulder looked to be fairly common. I wouldn't do lamb if you aren't used to cooking it. For beef I would probably try it with boneless short ribs, but I'm not really a chef.